Simulated power control for doubly-fed pumped storage units

doi:10.16511/j.cnki.qhdxxb.2020.22.025

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Abstract The control system for doubly-fed pumped storage units used to regulate the grid power was modeled using a hydraulic-mechanical-electric coupled system of the pumped storage power plant for transient process. The power control system modeled a doubly-fed induction machine (DFIM) using the stator voltage oriented vector control strategy. The model was used to study the power regulation of a 300 MW doubly-fed variable speed unit connected to an infinite bus with comparisons to a conventional fixed-speed unit with an electrically excited synchronous machine. The results show that the DFIM stator active power can be controlled directly by the rotor current so that the stator active power of the variable speed unit can accurately track the power reference. The fixed-speed unit output power is the mechanical power generated by the pump turbine, which can be changed by modifying the guide vane opening and adjusting the flow. However, the penstocks are quite long, so the flow rate and the power of the fixed-speed unit change slowly.

Keywords variable speed pumped storage unit doubly-fed induction machine (DFIM) power control

Issue Date: 28 April 2021

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	HU Wanfeng
	FAN Honggang
	WANG Zhengwei

Cite this article:

HU Wanfeng,FAN Honggang,WANG Zhengwei. Simulated power control for doubly-fed pumped storage units[J]. Journal of Tsinghua University(Science and Technology), 2021, 61(6): 591-600.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2020.22.025 OR http://jst.tsinghuajournals.com/EN/Y2021/V61/I6/591

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